Improved portable apparatus for evaporating saccharine juices



A. J. Low. Evaporating Pan. No. 35,880. Patented July 15, 1862.l

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UNITED STATES PATENT j OFFICE.

ANDREV J. LOI/V, OF GERMAN TOWNSHIP, PENNSYLVANIA.

IMPROVE!) PORTABLE APPARATUS FOR EVAPORATING SACCHARINE, JUICES.

Specification forming part of Letters Patent No. 35,80, dated July l5, 1802.

VTo all whom, it may concern,.-

Be itknown that I, ANDREW J. LOW, of German Township, in the county of Fayette and State of Pennsylvania, have invented a new and Improved Portable Evaporating Apparatus; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part of this specication, in which- Figure lis aperspective view of my improved apparatus, and Fig. 2 is a vertical longitudinal section of the same, the section being taken through the middle.

Similar letters of reference indicate corresponding parts in the two figures.

This invention consists in an arrangement of devices whereby the operation of removing the scum from the surface of the liquor is greatly facilitated; also, in a device for varying the inclination of the evaporating-pan.

To enable others skilled in the art to fully understand and use my invention, I will proceed to describe its construction and operation.

A represents a furnace, which is mounted on two wheels, B B, placed on each side, behind the grate O,which extends from the front end of the furnace to the offset a, from which to its back end the furnace is gradually decreased in depth by an inclined bottom, b,whieh,with the sides and bottom of the pan, forms a flue to conduct the unconsumed gases of combustion into the chimney C at the back end of thevfurnace.

c is a fire-door inthe front end of the furnace.

D is a square socket attachedto the back end of the furnaceby two bars, d d,which embrace the sides of the furnace, and are fastened thereto by rivets or' in any other suitable manner.

E is a tongue or draft-pole, fitted at one end in the socket D, and fastened therein by a screw, F, which passes through both socket and tongue. This screw F is provided at its lower end with a swiveled foot, G, and at its upper end terminates in a winch, H, by means of which latter the screw may be rotated, and the back end ofthe furnace raised orlowered, and consequently the inclination of the evaporating-pan varied, as may be desired, to accelerate or retard the flow of liquor from one division or compartment of the pan to another.

I is an evaporating-pan, divided in the several compartments, KL M N O P, and provided at its front end or in the compartment K K, ofthe eva-porating-pan I. The evaporatingpan I at its front end is considerably widerthan the furnace, and is so placed on it as to project in front and equally over its vside. The back end of the pan I, for the width of three pans on one side and two on the other, exactly correspends in width with the furnace. The compartments of the panIcommunicate with each other through openings made alternately in the ends of the partitions 7L, which openings are closed by sliding gates J. The front compartment or receiver, K, is about equal in capacity to the three succeeding compartments L M N. The last compartment, P, in which the finishing process takes place, is separated from the direct action of the fire by a plate, i, and itis provided in one end with a faucet, 7c, through which the finished article is drawn off.

The operation is as follows: The evaporating-pan being placed in a proper position and re started in the furnace, the raw juice is placed in the compartment or receiver K,where it is allowed to remain at a temperature of about 212 Fahrenheit-a sufficient length of time to allow a greater portion ofthe impurities to rise to the surface of the liquor in the form of scum. This scum, by the action of the liquor in ebullition, is forced toward the inclined plane J ,where the liquor,not being of the firein the furnace, is less agitated. The scum collected together at the foot of the inclined plane is drawn up it by a skimmer of any suitable form and deposited into the inclined trough c. Any juice accidentally skimmed up with the scum passes through the strainer and is returned into the compartment through the pipe f. The'scum being removed from the surface of the liquor in the rst compartment 0r receiver K, the gate j, openingin .the succeeding compartment L, is raised and the liquor allowed to run therein, and theprocess ofevaporation continued. The first compartment or receiver K is then refilled with crude juice, and the same operation gone through as before. The liquor, after remain iugacertainlength of timeinthe compartment L and undergoing the process of evaporation,

is let into the succeeding` compartment and at proper intervals thereafter into each succeed ing` compartment, undergoing` in each a partial evaporationruntil reaching the last compartinentvhen the process is completed and the 1inishcd article drawn off through thefaucet. As each eompartlnentis emptied of its evaporated liquor, that of the preceding compartment is let in to take its place. The heat under the several divisions or compartments of the evaporating-pan4 gradually decreases in intensity from the receiver to the iinishing-compart ment, the latter being` protected from the direct action of the fire by a metal plate.

Having` thus described my invention, what I claim as new, and desire to secure by Letters l Patent, is-

l. The receiver K, inclined plane J, in combination with the trough e, strainer g, and pipe f, when arranged to operatein the manner and for the purpose set forth.

2. The screw Rwinch H, and swivelcd foot G, in combination with the evaporating-pan I and Wheels B B, when arranged to operate in the manner specified.

ANDREV J. LOW.

Vitnesses:

J, D. SPRINGER, WILLIAM H. DAwsoNy 

